Elevator-door stop.



- H. G. VOIGHT.

ELEVATOR DOOR STOP. `APPLICATION FILED NOV. 30. 1912.

1,069,078, l Patented Juiy 29, 1913 5T) y. .mx

@XN/bumsen: 3 wue nto/c l "citizen of the 'United States, ffBitain,

fnecticut, have 4invented -certain new and use-4` #ful Improvements in Elevator-Door Stops,

which the following is exact description.

ilnoeaorsf 'HENRY G. verona", oF Nawenimn, coNN-scricur.

allfwlzrom t may concern: y Be itvknown that I, Hun-mty G. 'Volorrn a residing at New State of Con- Hai'tford county,

a full, clear, and

My invention relates to a door check de- "vice 'for sliding doors, the same bein vpariding `sha-its: to provide to 4prevent, the. door l:from being reopened 'thus prevent-f A:from ,forcing door open while the *door Vis closing in event :the elevator Ihas started away betoie the door has beenfullyclosed.

f lIn the accompanying drawings, 'Figurel -i'stfl'a view 'of the upper part of an elevator 'door and the adjacent parts ofthe' casing, 4*and illustrating my improved sto -in 'one Fig. v2

position, the door being fully Iclose isja similar 4view showing the arts in a slightly diilerent position, the oor being partially opened.- Fig. 3 is an end-elevatlon o the parts shownin Fig.. 1. Fig. 4 1s a' side elevation' of av modification.

1 represents a sliding door.

2 irepresents a decreasing.

Any suitable means such as shown in. Fig. 1. i

The'door is mounted in any suitable man ner to slide, and, for-example, may be supported fromV an overhead 'track 3 by means of a hanger 4.

In the form shown inFigs. 1 to 3, the sto comprises a freely movable pivoteddepen ing stop element such as a pawl 5 pivoted at 6 to a bracket 7,`.which may be mounted upon the overhead track, or other suitable support, being adjustable to a roper position thereon and'there xed as y means of a set screw 8.

9 is a rack having a suitable number of projections 10-10, which are arranged to hold the end of the pawl 5. This4 rack is carried by the door 1 along its upper edge and arranged to travel underneath the pivot 6 of the pawl and to engage and swing the pawl. The forward end of the .rack 49. terminates' at or near the forward edge of aanvari-oa-nooa sror..

,Specification of ALetters Patent. `rkppllioaton ilediovember 30,3912. v Serial No. 734,255.

fsam suceessivelypass lluider fthe;

-- door l-w'ill, of lcourseflbe 1choc stoped Y `by the pawl engagingone of 'the shan ers .represents the overhead Asents the bracket and 5*'- may be provided Ito;

hold the door locked in a closed position,vl d

stance may have a smooth bearing surface however, the end of the rack the door l,-whi1etherear end or the rack 9 terminates ata point .forward ofthew- Vawl 5, for example, as shown in. Fig. l. "the door -1 yisi -now opened,`the rear end'of the Patented ,muy as, 1913.

Umm@ STATES? ,rnrnnronricn 5 and -swing it back, asshown 'in dotted lines, Fig. 2, so that the rack 9 Awill travel -reely under "the pawl on its opening movement, the pawl being so' located 'that-.when the door is fully-opened, the-forsw'artl-edge of the` rack @9 will `Ward'end of the `rack 9^wll e 5 and swingit et the angle "in" lines, iFig.' 2

-whereu on lits end will fdrop back of the` attempt, while the pawl is intlus-fposition and resting upon the ra'o'k 10, thus 'making -it impossble-fryanyone, -either inside oreutside yoftheelevatorfshaft, to lreopen lthe `door; until -the-same nsf' lfully :bracket 7a. 4 l

Y9a represents the rack which in Athis infor engagement with the cam 5"-. The cam r5? operates precisely .as the pawl 5 in conexcepting that in` junction'with the rack 9'1 stead ofdengaging the rack 9 at several points, as at 1 0-10 in Fig; 1,v th cam will engagethe rack to stop the reopening of the door at. any point. The cam constructionV has some advantages over the pawl construction in that it not only will engage the rack 9 at any point, biitis also silent in its action. "VVhen the the door 1 can be moved only in the direction of the arrow indicated thereon. When, rail 9B passes the cam 5, the door 1a may be moved in an parts stand as in Fig. 4,

titi

i clear the :pawlyandlfallowi it 'to -again fdropdogthe `positionshown-j-iniFig. -1. *'Whenthe door 11s-closed, *thozfforff gage-thepawl looted "in solid aWLfAny Eid los

opposite direction, the rear of the rack en'- gagmg the cam 5a and swinging it into the Iposition 'indicated 1n dotted lines. This construction has a further advantage in that the operator ci? an elevator car must open sfoodthat I regard .in the 'same manner bythe door full-y :to zif/llow passengers4 to enterA and niakeptheir departure beforel he can @lose -the same.

"QT-'In a``br`oa'd. sense, I wish it-tobe underthe eccentric cam a as a pawl or the equivalent thereof in that it operates to performllic saine function as the part 5,- "accomplishing said function in a slightly diiferent manner, nevertheless both parts are aot-iiatedby gravity and are moved the rack or rail with whi that partcoperates to positively stop the l or against an opening movement when partially closed. It should, therefore, be understood that in the' use of that term,

pawl las employed in the following claims; I intend that 1t shall cover and include both forms of pawl shoixaherein or other equivalent thereof. Thile I have shown'the pawl and rack as suitably arranged and associated for operrange I rangement shown 1n the drawings, however,

obvious that it may be ation; with the upper edge of the door, it is connected with the lower part of the door, in which event the pawlwould' be carried by the door and the rack would be. carried by the Hoor, which arl ent is an obvious reversal. The aris referable.V c

hat I claim 1s:

1. A stop for a sliding door comprising a freely movable pivoted depending stop element, a railarranged to be carried by the door, the length of said ra-il being less .than the full range of the sliding movement of the door, said stop being pivoted at a point to the vrear of said rail when the door is full closed, said point being also forward' of t e rail when said door is fullyopened, andmeans to cause said stop to ook with -l lthe ,rail to .prevent lthe reopening of the door on its closing movement While said stop is resting on said rail.

2. A stop'for sliding doors comprising a freely movable pivoted depending stop element, a rail arranged to be carried by the door, the length of said rail being less than the full range of the sliding movement of 'the door,'said stop being pivoted at a point to the rear of said rail when the door is fully closed, said point being also forward of the rail when said door 1s 4fully opened, and means to cause said stop. to lock with the rail to prevent the reopening of the vdoor on its closing movement while said stop is resting on said rail, said rail having shoulders at intervals arranged to engage said stop whensaid stop 1s inclined 1n rests on top of said rail.

3. A lstop for a sliding door comprising a freely swinging depending stop element carried by the door or casing, a coacting rail carried by the opposite part, said rail being shorter than the range of movement of the sliding door, said stop being free of said rail when the door is fully opened or 'fully closed, the length of said stop element being such that when the door is being closed and said stop lisresting on said rail it will stand at'suchan angle'thereto that said direction of movement cannot be reversed until the rail has passed the stop, permitting the latter to swing down to the rear of said rail, whereupon the next opening movement of the door will swing said .stop in an opposite direction to that first described HENRY G. VOIGHT.

one direction and Witnesses y GwnNnoLINn A. JACKSON, Mb S. V. IARD. 

